Question

I need to know how to do this question

Answer 1

I showed my work on paper and took a picture of it.

Answer 2

The LCM  is (x + 2)(x - 4)

so we have 

4(x - 4) - 3(x + 2)              x - 22
---------------------- =    -------------------            Answer
(x + 2)(x - 4)                 (x + 2)(x - 4)